EDC Impressum & DSE

Electrophoresis
Development & Consulting
Dr. Hanspeter Schickle
Wolfgang Gstrein

Datenschutzerklärung >>

Blue (Coomassie-staining) or black (silver-staining) curtain in the alkaline region

How to avoid the Pharmalytes-SDS complexes to be stained after the second dimension?
Pharmalytes are optimal as addition in the first dimension. Here two remedies.....

April 03, 2025

Remedy #1: Stay with the Pharmalytes and use the additional washing steps given in the different staining methods: Hot Coomassie, Semi Colloidal Coomassie
Direct Coomassie Staining without the additional washing steps
Pfeil

Pharmalytes in the first dimension - Hot Coomassie Staining
without the additional washing steps
Hot Coomassie + additional washing steps

Pharmalytes in the first dimension - Hot Coomassie Staining
 + the additional washing steps

Remedy #2: Use Servalytes / Sinulytes in a lower concentration in the first dimension:
Pharmalyte in the first dimension
Pfeil

Pharmalyte-SDS complexes in the second dimension (left side), silver-staining started with TCA (Trichloroacetic Acid)
Sinulyte in the first dimension

Servalyte / Sinulyte / SepaLyte will not form SDS complexes in the second dimension

EDC Electrophoresis Development & Consulting, Vor dem Kreuzberg 17, 72070 Tübingen (Germany)